This year’s New York International Auto Show was quiet, a confab for a shrinking industry. Sales have been tanking steadily for nearly every manufacturer. The corners of the showroom floor occupied by potentially doomed brands, like Hummer, felt a little like mausoleums. Still, plenty of automakers fought through the pain and unveiled interesting cars, which you can check out here.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.